Virus:DR/Autoit.I.2
Date discovered:16/10/2007
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:215.456 Bytes
MD5 checksum:3b5cf70876ef2e58a30dfa85c16b49bd
IVDF version:7.00.00.94 - Tuesday, October 16, 2007

 General Method of propagation:
• Autorun feature


Aliases:
   •  Mcafee: W32/Autorun.worm.h virus
   •  Sophos: W32/SillyFDC-AP
   •  Panda: W32/Autorun.SF
   •  Eset: Win32/Autoit.AC
   •  Bitdefender: Worm.Generic.77741


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Downloads malicious files
   • Drops malicious files
   • Lowers security settings
   • Registry modification

 Files It copies itself to the following locations:
   • %SYSDIR%\msmsgs.exe
   • %drive%\system.exe
   • %drive%\%random directories%.exe



It overwrites a file.
– %PROGRAM FILES%\ESET\nod32.exe

With the following contents:
   • %executed file%




It deletes the following files:
   • %PROGRAM FILES%\ESET\nod32.exe
   • %PROGRAM FILES%\ESET\nod32kui.exe
   • %PROGRAM FILES%\ESET\nod32krn.exe



The following files are created:

– %WINDIR%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

– %drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%




It tries to download some files:

– The location is the following:
   • http://ppt.th.gs/web-p/pt/file/**********
At the time of writing this file was not online for further investigation.

– The location is the following:
   • http://ppt.th.gs/web-p/pt/file/**********
At the time of writing this file was not online for further investigation.

– The location is the following:
   • http://ppt.th.gs/web-p/pt/file/**********
At the time of writing this file was not online for further investigation.

 Registry One of the following values is added in order to run the process after reboot:

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Msmsgs"="%SYSDIR%\Msmsgs.exe"
   • "SYS1"="%SYSDIR%\system.exe"
   • "SYS2"="%SYSDIR%\bad1.exe"
   • "SYS3"="%SYSDIR%\bad2.exe"
   • "SYS4"="%SYSDIR%\bad3.exe"



The values of the following registry keys are removed:

–  [HKCU\Software\Microsoft\Internet Explorer\Main]
   • "Window Title"

–  [HKLM\SYSTEM\ControlSet001\Services\NOD32krn]
   • "ImagePath"

–  [HKLM\SYSTEM\ControlSet001\Services\nod32drv]
   • "ImagePath"



The following registry key including all values and subkeys is removed:
   • [HKCR\lnkfile\isShortcut]



The following registry key is added:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\system]
   • "DisableRegistryTools"=dword:0x00000001
   • "DisableTaskMgr"=dword:0x00000001



The following registry keys are changed:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
   New value:
   • "GlobalUserOffline"=dword:0x00000000

– [HKCU\Software\Microsoft\Windows NT\CurrentVersion\TaskManager]
   New value:
   • "Preferences"=hex:9C,02,00,00,E8,03,00,00,02,00,00,00,01,00,00,00,01,00,00,00,5A,02,00,00,02,00,00,00,FA,04,00,00,18,03,00,00,01,00,00,00,00,00,00,00,02,00,00,00,03,00,00,00,04,00,00,00,FF,FF,FF,FF,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,00,00,00,00,00,00,01,00,00,00,02,00,00,00,03,00,00,00,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,01,00,00,00,00,00,00,00,00,00,00,00,01,00,00,00,00,00,00,00,01,00,00,00,00,00,00,00,00,00,00,00,01,00,00,00,02,00,00,00,04,00,00,00,06,00,00,00,0B,00,00,00,0E,00,00,00,FF,FF,FF,FF,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,02,00,00,00,6B,00,00,00,32,00,00,00,6B,00,00,00,23,00,00,00,46,00,00,00,46,00,00,00,3C,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,6B,00,00,00,00,00,00,00,01,00,00,00,02,00,00,00,03,00,00,00,04,00,00,00,05,00,00,00,06,00,00,00,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,FF,6F,00,00,00,00,00,00,00,00,00,00,00,01,00,00,00

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "Hidden"=dword:0x00000002
   • "HideFileExt"=dword:0x00000001
   • "ShowSuperHidden"=dword:0x00000000
   • "SuperHidden"=dword:0x00000000

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
   New value:
   • "NoDriveTypeAutoRun"=dword:0x0000005b
   • "NoFind"=dword:0x00000001
   • "NoFolderOptions"=dword:0x00000001

 Process termination List of processes that are terminated:
   • winsystem.exe
   • handydriver.exe
   • kerneldrive.exe
   • Wscript.exe
   • cmd.exe
   • nod32krn.exe
   • nod32kui.exe


 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Petre Galan on Monday, December 14, 2009
Description updated by Petre Galan on Monday, December 14, 2009

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